Download - Power saving motors
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ENERGYSAVING MOTORS
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INDEX:
Introduction Importance of motorsNeed of saving energy in motorsTechniques of energy savingConclusion
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INTRODUCTION:An electric motor is a device
that converts electrical energy into rotary kinetic energy.
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IMPORTANCE OF MOTORS
Electric motors are used to drive many items of machinery such as pumps, fans, conveyor belts compressors etc.
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NEED OF SAVING ENERGY IN MOTORS
Almost 70% of all industrial electricity is consumed by electric motors.
In a single year the cost of the energy needed to run a motor can be as much as ten times its purchase cost.
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ENERGY WASTAGE IN NORMAL IN INDUCTION MOTOR
HEAT LOSSESHIGH CURRENT LOSSESFRICTIONAL LOSSESIMPROPER TRANSMISSION SYSTEM
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EFFICIENT METHODS OF SAVING ENERGY IN MOTORS:
Soft StartersVariable Speed Drives(VSD)Smart MotorsProper Transmission Systems
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SOFT STARTERS:The device can sense if the motor is
lightly loaded or idling, which is when the motor is least efficient, and then ramps the power usage down while maintaining the motor at a constant speed.
Temporarily reduce the load and torque in the power train of the motor during startup.
Eliminates the harsh, violent mechanical stresses.
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GRAPHS SHOWING COMPARION BETWEEN NORMAL MOTORS AND
SOFT STARTERS
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2.VARIABLE SPEED DRIVESA VSD converts the incoming
electrical supply from a fixed frequency to a variable frequency output. This frequency variation allows the VSD to control the speed of the motor.
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3.SMART MOTORS Smart motors
combine the functionality of an electric motor, a VSD and a control unit. to analyse load conditions without having to feedback information to a central control system. This means faster response time and reduced cable losses.
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4.TRANSMISSION SYSTEMDirect drives, where the load is
coupled directly to the motor shaft. drive is correctly aligned with the motor to prevent energy losses.
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Belt-driven pulleys, where the output speed is adjusted by a pulley system of different-sized wheels connected by a belt, and the pump/fan speed can be reduced by changing the pulley ratio
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CONCLUSIONSaving energy in motors will help
to great extent as the power used by electric motors accounts for nearly two-thirds of the electricity consumed by industry.
Switching off motors wherever possible.
Locating motors and drives in areas that don't get too hot.
Keeping components clean .
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THANK YOU
By:Payal SaxenaP.Divya5th Sem, EEESSCET